花生资源耐盐性的鉴定与评价

为筛选耐盐花生种质并为花生耐盐遗传基础研究提供材料,选用相对发芽势、相对发芽率、相对发芽指数和盐害率为指标,以0.5%Na Cl为胁迫浓度,对128份花生种质进行芽期耐盐性鉴定。结果表明,盐胁迫对花生种子萌发有显著的抑制作用,但盐胁迫的抑制效应因种质不同而存在明显差异;128份种质中,高耐盐种质仅占5%左右。在耐盐评价指标方面,除盐害率或相对发芽率以外,相对发芽指数可以作为评价指标之一。此外,盐胁迫条件下,地方品种的发芽速度高于育成品种。本研究筛选出JS011、JS024、JS125、JS491、JS523、JS524、JS525等7份高度耐盐种质可用于花生耐盐性基础研究的材料。

Identification and Estimation of salt tolerance in peanut germplasm

For screening salt tolerance germplasm and providing materials for genetic research in peanut, based on indexes including relative germination vigor, relative germination rate, relative germination index and salt damage rate, we selected 128 peanut germplasms for salt tolerant identification and estimation under 2.5% NaCl. We found significant but various depressing levels of germination rate under salt stress among different germplasms, and only 5% of 128 germplasms were highly resistant to salinity. We also found the relative germination index was an useful evaluation index for salt tolerance besides salt damage rate and relative germination rate. After all, we comprehensively screened 7 materials (JS011, JS024, JS125, JS491, JS523, JS524 and JS525) as salt tolerance germplasms for further research.